C#不一致的可访问性错误

我在C#中修复面向对象程序中的错误时遇到了麻烦。该程序有9个类，在一个类中。错误是可访问性不一致：参数类型"Employee.Employee"的可访问性低于方法"EmploloyeeInput.CollectEmployeeInfo（Employee.Employe）"关于编码

    public static void CollectEmployeeInfo(Employee theEmployee)
    {
        theEmployee.Firstname = InputUtilities.getStringInputValue("First Name");
        theEmployee.Lastname = InputUtilities.getStringInputValue("Last name");
        theEmployee.Gender = InputUtilities.getCharInputValue("Gender");
        theEmployee.Dependents = InputUtilities.getIntegerInputValue("# Dependents");
    }

CollectEmployeeInfo显示了错误，我不确定必须对其他类做些什么才能修复错误。如有任何帮助，将不胜感激

class Employee
{
    public const double MIN_SALARY = 20000;
    public const double MAX_SALARY = 100000;
    public const int MIN_DEPENDENTS = 0;
    public const int MAX_DEPENDENTS = 10;
    public const string DEFAULT_NAME = "not given";
    public const char DEFAULT_GENDER = 'U';
    public const string DEFAULT_TYPE = "Generic Employee";
    protected string firstName;
    protected string lastName;
    protected double annualSalary;
    protected char gender;
    protected int dependents;
    protected static int numEmployees = 0;
    protected Benefits employeeBenefits;
    protected string employeeType;
    public Employee()
    {
        firstName = DEFAULT_NAME;
        lastName = DEFAULT_NAME;
        annualSalary = MIN_SALARY;
        dependents = MIN_DEPENDENTS;
        numEmployees++;
        employeeBenefits = new Benefits();
    }
    public Employee(string firstname, string lastname, char gender, int dependents, double annualsalary, Benefits employeeBenefits)
    {
        Firstname = firstname;
        Lastname = lastname;
        AnnualSalary = annualsalary;
        Gender = gender;
        Dependents = dependents;
        EmployeeBenefits = employeeBenefits;
        numEmployees++;
    }
    public Benefits EmployeeBenefits
    {
        get { return employeeBenefits; }
        set
        {
            if (value == null)
                employeeBenefits = new Benefits();
            else
                employeeBenefits = value;
        }
    }
    public Employee(string employeeType)
        : this()
    {
        EmployeeType = employeeType;
    }
    public string Firstname
    {
        get { return firstName; }
        set
        {
            if (String.IsNullOrEmpty(value))
                firstName = DEFAULT_NAME;
            else
                firstName = value;
        }
    }
    public string Lastname
    {
        get { return lastName; }
        set
        {
            if (String.IsNullOrEmpty(value))
                lastName = DEFAULT_NAME;
            else
                lastName = value;
        }
    }
    public double AnnualSalary
    {
        get { return annualSalary; }
        set
        {
            if (value > MIN_SALARY & value < MAX_SALARY)
                annualSalary = value;
            else if (value < MIN_SALARY)
                annualSalary = MIN_SALARY;
            else
                annualSalary = MAX_SALARY;
        }
    }
    public char Gender
    {
        get { return gender; }
        set
        {
            if (value == 'F')
                gender = value;
            else if (value == 'f')
                gender = value;
            else if (value == 'M')
                gender = value;
            else if (value == 'm')
                gender = value;
            else
                gender = DEFAULT_GENDER;
        }
    }
    public int Dependents
    {
        get { return dependents; }
        set
        {
            if (value >= MIN_DEPENDENTS & value <= MAX_DEPENDENTS)
                dependents = value;
            else if (value < MIN_DEPENDENTS)
                dependents = MIN_DEPENDENTS;
            else
                dependents = MAX_DEPENDENTS;
        }
    }
    public static int NumEmployees
    {
        get { return numEmployees; }
    }
    public string EmployeeName
    {
        get { return firstName + " " + lastName; }
    }
    public string EmployeeType
    {
        get { return employeeType; }
        set
        {
            if (String.IsNullOrEmpty(value))
                employeeType = DEFAULT_TYPE;
            else
                employeeType = value;
        }
    }
    public double CalculatePay()
    {
        return annualSalary / 52;
    }
    public double CalculatePay(double modifiedSalary)
    {
        AnnualSalary = modifiedSalary;
        return AnnualSalary / 52;
    }
    public override string ToString()
    {
        string output;
        output = "'n============ Employee Information ============";
        output += "'n't         Type:'t" + employeeType;
        output += "'n't         Name:'t" + firstName + " " + lastName;
        output += "'n't       Gender:'t" + gender;
        output += "'n't   Dependents:'t" + dependents;
        output += "'n'tAnnual Salary:'t" + annualSalary.ToString("C2");
        output += "'n't   Weekly Pay:'t" + CalculatePay().ToString("C2");
        output += "'n't" + employeeBenefits.ToString();
        return output;
    }
}

}